. >>> north korea's foreign minister says america's policies toward his country to lead to nuclear war. he contends the u.s. has secret plans for another korean war. his speech to the united nations was focused mostly on his country whose style relationship with the u.s. the u.s. -- hostile relationship with the u.s. the u.s. hasn't responded to the speech. >>> republican challenger mitt romney taking a new stance on illegal immigration. as susan mcginnis reports it comes as he and the president are getting ready for their first head-to-head debate. >> reporter: more than 5,000 people packed the air and space museum in denver to hear mitt romney on monday. >> this is a great place to be. >> reporter: colorado is among the battleground states that have a large hispanic population and romney now tells the "denver post" he will honor temporary work permits for young illegal immigrants granted by president obama in an executive order in june. it's the first time he has expressed support for the act. here's what he said in los angeles recently. >> instead of playing politics with these chil